Bài viết trình bày nghiên cứu sự khác biệt về đặc điểm hình ảnh của các khối u sau phúc mạc ngoài thận trên cắt lớp vi tính 128 dãy đầu thu (128 MSCT). Kết luận: Có sự khác biệt về một số đặc điểm hình ảnh của các khối sau phúc mạc ngoài thận ở trẻ em trên 128 MSCT. | MỘT SỐ ĐẶC ĐIỂM HÌNH ẢNH KHÁC BIỆT NGHIÊN CỨU KHOA HỌC CỦA KHỐI SAU PHÚC MẠC NGOÀI THẬN Ở SCIENTIFIC RESEARCH TRẺ EM TRÊN PHIM CHỤP CẮT LỚP VI TÍNH 128 DÃY ĐẦU THU The 128 MSCT imaging differentiations of retroperitoneal extra-renal masses in children Hoàng Tùng Lâm Phó Hồng Điệp SUMMARY Perpose Find out the differrentiation of 128 MSCT characteristics of retroperitoneal extra-renal mass in children Material and methods we had 128 MSCT images of 67 children patients in National Children s hospital from January 2018 to April 2019 with pathologically proven of the retroperitoneal extra-renal masses. The patients was divided into 9 groups neuroblastoma and ganglioneuroblastoma n 42 Adrenal non-tumorigentic masses n 8 teratoma n 8 ganglioneuroma n 3 hemangioma n 1 neurofibroma n 1 rhadomyosarcoma n 1 undifferentiated pleomorphic sarcoma n 1 pheochromocytoma n 1 york sac tumor n 1 . We retrospectively reviewed the CT images of 67 children patients to find out the imaging differrentiation compared the enhancement level variations between groups and the enhancing of masses with muscle liver spleen. Results Age of all groups is from 3 days to 11 years the age of adrenal non-tumorigentic masses is lowest. No statitistically significant different between male and female in retro-peritoneal extra-renal masses. Diameter of adrenal non-tumorigenntic group is smallest. Neuroblastomas teratomas geminoma and sarcoma are usually large. Encasement of vessel calcification abdominal lymph nodes and far metastasis findings are common signs in neuroblastoma and ganglioneuroblastoma group. Fatty and calcified CT findings are common in teratoma group. There are statitistically significant different enhancement level variation between groups. If the enhancing of the masses was lower than the muscle these are usually benign. If the enhancement of the masses was higher than the muscle and lower than spleen it can be benign or malignant neuroblastoma is very common in this level. Hemangioma
